Device for measuring elastic characteristics of organism tissue
First Claim
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1. A device for measuring elastic properties of a living tissue, wherein elastic properties of a tissue surrounding a canal of a living body are measured by inserting the device through the canal, characterized by comprising:
- a probe base to be inserted through the canal;
a plurality of probes provided around an insertion axis of the probe base and at the same insertion depth in a direction of the insertion axis, the probes being placed in close vicinity to the tissue inside the canal so as to be driven in a manner being pressed against and withdrawn from a plurality of measurement positions on the tissue;
a plurality of stress detection sensors provided on the respective probes, each of which detects a stress applied to the tissue at each measurement position on the basis of a reaction force from the tissue when the probe is driven so as to be pressed and withdrawn;
a plurality of displacement detection sensors provided corresponding to respective stress detection sensors, each of which detects a displacement of the tissue at each measurement position on the basis of a displacement of each stress detection sensor with respect to the probe base;
a displacement profile calculation part for calculating a displacement profile of the canal displaced in a manner so as to be pressed and withdrawn, based on each displacement at each measurement position and on a standard profile having no stress applied to the tissue, at the above described insertion depth into the canal; and
display means for displaying a change of the displacement profile caused by the pressing and withdrawing motions and a change of each stress value corresponding to each profile in real time.
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Abstract
A device for measuring elastic properties, comprising a long bar-like probe base (42) and probes (50a, 50c) fitted to the probe base (42) driven as to be pressed against and withdrawn from a living body tissue. The probes are so formed that generally semi-spherical contact balls (58) having stress detection bases (56) are fitted to the ends of leaf strings (52) and stress detection sensors (60) are disposed on the stress detection bases (56). Light-receiving elements are fitted to the opposite side of the leaf displacement sensors (62a, 62b). The stress sensors (60) and displacement sensors (62a, 62b) are connected to the device body through signal lines (92, 94), respectively. The profile of the displacement of the tissue is calculated and displayed in a manner indicating correlation with stress.
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Citations
11 Claims
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1. A device for measuring elastic properties of a living tissue, wherein elastic properties of a tissue surrounding a canal of a living body are measured by inserting the device through the canal, characterized by comprising:
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a probe base to be inserted through the canal;
a plurality of probes provided around an insertion axis of the probe base and at the same insertion depth in a direction of the insertion axis, the probes being placed in close vicinity to the tissue inside the canal so as to be driven in a manner being pressed against and withdrawn from a plurality of measurement positions on the tissue;
a plurality of stress detection sensors provided on the respective probes, each of which detects a stress applied to the tissue at each measurement position on the basis of a reaction force from the tissue when the probe is driven so as to be pressed and withdrawn;
a plurality of displacement detection sensors provided corresponding to respective stress detection sensors, each of which detects a displacement of the tissue at each measurement position on the basis of a displacement of each stress detection sensor with respect to the probe base;
a displacement profile calculation part for calculating a displacement profile of the canal displaced in a manner so as to be pressed and withdrawn, based on each displacement at each measurement position and on a standard profile having no stress applied to the tissue, at the above described insertion depth into the canal; and
display means for displaying a change of the displacement profile caused by the pressing and withdrawing motions and a change of each stress value corresponding to each profile in real time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10)
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8. A device for measuring elastic properties of a living tissue, wherein elastic properties of a tissue surrounding a canal of a living body are measured by inserting the device through the canal, characterized by comprising:
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a probe base to be inserted through the canal;
a plurality of probes provided around an insertion axis of the probe base and at the same insertion depth in a direction of the insertion axis, the probes being placed in close vicinity to the tissue inside the canal so as to be driven in a manner being pressed against and withdrawn from a plurality of measurement positions on the tissue;
a plurality of hardness sensor parts provided on respective probes;
hardness detection means for detecting a hardness of the tissue at each measurement position, based on a signal from the hardness sensor part;
a plurality of displacement detection sensors provided corresponding to the respective hardness sensor parts, each of which detects a displacement of the tissue at each measurement position on the basis of a displacement of each hardness sensor part with respect to the probe base;
a displacement profile calculation part for calculating a displacement profile of the canal displaced in a manner so as to be pressed and withdrawn, based on each displacement at each measurement position and on a standard profile having no stress applied to the tissue, at the insertion depth into the canal; and
display means for displaying a change of the displacement profile caused by the pressing and withdrawing motion and a change of each hardness corresponding to the profile in real time. - View Dependent Claims (9, 11)
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Specification
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Current AssigneeNihon University Educational Association
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Original AssigneeNihon University Educational Association
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InventorsYamaguchi, Osamu, Omata, Sadao, Usui, Hideyuki, Constantinou, Chris E
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current600/587
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